Strain memorization in strained SOI substrates of semiconductor devices
    3.
    发明授权
    Strain memorization in strained SOI substrates of semiconductor devices 有权
    半导体器件的应变SOI衬底中的应变记忆

    公开(公告)号:US08329531B2

    公开(公告)日:2012-12-11

    申请号:US12917870

    申请日:2010-11-02

    摘要: In sophisticated semiconductor devices, the initial strain component of a globally strained semiconductor layer may be substantially preserved during the formation of shallow trench isolations by using a rigid mask material, which may efficiently avoid or reduce a deformation of the semiconductor islands upon patterning the isolation trenches. Consequently, selected regions with high internal stress levels may be provided, irrespective of the height-to-length aspect ratio, which may limit the application of globally strained semiconductor layers in conventional approaches. Furthermore, in some illustrative embodiments, active regions of substantially relaxed strain state or of inverse strain type may be provided in addition to the highly strained active regions, thereby enabling an efficient process strategy for forming complementary transistors.

    摘要翻译: 在复杂的半导体器件中,通过使用刚性掩模材料可以在形成浅沟槽隔离期间实质上保留全局应变半导体层的初始应变分量,这可以有效地避免或减少图案化隔离沟槽时半导体岛的变形 。 因此,可以提供具有高内应力水平的选定区域,而不考虑高度 - 长度的纵横比,这可能限制在常规方法中全局应变半导体层的应用。 此外,在一些说明性实施例中,除了高应变活性区域之外,还可以提供基本上松弛的应变状态或逆应变类型的有源区,从而实现用于形成互补晶体管的有效的工艺策略。